Stop-watch.



No. 685,635. PatentedV Oct. 29, |90l.

UNITED STATES PATENT OFFICE.

JAMES PARKINSON, OF GREENVILLE, MISSISSIPPI, ASSIGNOR OF ONE-THIRD TO FRANK BINDER, OF GREENVILLE, MISSISSIPPI.

STOP-WATCH.

SPECIFICATION forming part of Letters Patent No. 685,635, dated October 29, 1901.

Application iiled May 25, 1901. Serial No. 61,948. (No model.)

T0 CLU wbOm/ 711160Z/ 007%0677/11! illustrated in the drawings, a suitable yoke, Be itknown thatI, JAMES PARKINsON,a citias 1, is pivotally inountedon the outer face zen of the United States, residing at Greenof the upper plate of a watch, and a suitable ville, in the county of Washington and State spring, as 2, is adapted to engage a portion 55 5 of Mississippi, have invented certain new and of the said yoke, as by having its free end ex useful Improvements in Stop-Watches; and tending into notch 3 in yoke 1. A lug, as e, I do hereby declare the following to be a full, is formed integral with yoke 1 and extends clear, and exact description of the invention, from t-he periphery thereof and is provided such as will enable others skilled in the art to with a beveled end, as 5, and a similar lug, 6o lo which it appertains to make and use the same. as 6, extends from the periphery of said yoke This invention relates generallytoimprove- 1 at a point nearer the center of the top plate ments in the construction of watches, and of the watch than lug 4t and is provided with more particularly to that class known as a beveled outer end, as 7. It will of course stop-watches. be understood that the exact size and shape 65 I5 The object of the invention is the producof the lugs 4 and 6 may be altered, as may be tion of a watch provided with means whereby convenient. the seconds-hand thereof maybe stopped with- A suitable elbow-lever, as 8, is preferably out affecting the movement of the other mechpivoted near the periphery of the top plate of 'anism of the watch. the watch, as at 9, and is provided with an 7o 2o Y Afurther object of the invention is the proarm, as 10, which is adapted to extend outvision of means whereby the shaft or arbor side the watch for operating the said lever, carrying the seconds-hand may be stopped' the leverin operation adapted to have its free while the pinion operating said shaft or arbor arm, as 11, partially rotate yoke 1, as herein continues to rotate. after described. The beveled end '7 of lug G 75 2 5 y Vith these and other objects in view it conis adapted to contact with one end of an insists of certain novel constructions, combinatermediate lever, as 12, which lever is pivoted tions, and arrangements of parts, as will be intermediate its length, as at 13, and its ophereinafter more fully described and claimed. posite end preferably contacts with one of the In the accompanying drawings, Figure 1 wingsof double-winged lever 11. Lever 14 8o 5o represents a top plan view of a watch prois pivoted, preferably centrally of its length,

vided with the features of the present invenas at 15, and carries at its free end a downtion, the dial and watch-operating train being wardly-extending arm or rod, as 16, which omit-ted to the more clearly illustrate the prespasses through an elongated aperture or slot, ent invention. Fig. 2 represents a similar as 17, in the top plate of the Watch. A suit- 85 35 view of the same, the parts having been opable spring, as 18, is adapted to press the end erated to stop the movement of the shaft or of lever 14, carrying arm 16, and prevent the arbor carrying the seconds-hand. Fig. 3 repsaid arm normally from coming in contact with resents an enlarged detail prespective of the the moving parts of the Watch mechanism or locking-lever and spring and the seconds-hand interfering with its operations. Penetrating 9o 4o arbor, pinion,and disk; and Figtrepresents the top plate just beyond the inner end of enlarged detail views,in top plan andside eleslot 17 and extending a suitable distance vation, respectively,of the seconds-hand arbor above the said plate is a shaft or arbor, as 19, or shaft, together with disk, pinion, and inthe upper end of which is adapted to carry. terposed spring. the seconds-hand of the watch. Mounted 95 45 In the art to which the present invention upon and rigidly secured to arbor 19 beneath apper'tains the provision of means whereby the top plate is a disk, as 20, which is prothe hands or one hand of the watch may be vided with suitable ratchet-teeth or notches stopped at a given instant, without regard to upon its periphery. Spaced apart from and the position of the said hand or-hands, has revolubly mounted upon arbor 19 below disk roo 50 been found very useful for well-known pur- 2O is a suitable pinion, as 21, which in operaposes, and in order to provide such means, as tion is in mesh with a pinion in the train of gears comprising the watch mechanism. A suitable annular shoulder, as 22, is rigidly mounted upon arbor 19 beneath pinion 21 and is adapted to prevent said pinion from dropping out of position. An annular sleeve, as 23, is revolubly mounted upon arbor 19 and is interposed between disk 2O and pinion 2l, the said sleeve being provided with a plurality of suitably-curved spring-arms, as 24 24, which are adapted to press against the under face of disk 20, the sleeve 23 being thereby held against pinion 21 under the pressure of said springarms.

When the parts are in the position shown in Fig. 1, the Watch operates in the common manner, and the seconds-hand is free to rorate, through the motion impartedby pinion 2l, through sleeve 23 and arms 24 to disk 2O and arbor 19; but when arm 10 is moved outwardly to the position shown in Fig. 2 arm 11 will engage the beveled face of lug 4, partially rotating yoke 1, and thereby moving lever 12 through contact with the beveled end 7 of lug 6, the said movement of lever 12 moving the inner end of lever 14 outwardly and the outer end, together with rod 16, inwardly, bringing said rod into engagement with the peripheral teeth or notches of disk 20, and thereby instantly stoppingthe movement of said disk, together with its arbor 19, and therewith the secon ds-hand of the watch. It will of course be obvious that when the disk 20 ceases to revolve through the locking effeet of rod 1G the pinion 2l will still be free to rotate, thereby permitting the Watch mechanism to continue its usual movement, not in the least being affected by the stopping of the seconds-hand. To start the seconds-hand, arm 10 is pressed inwardly to the original position, thereby freeing lug 4 and permitting yoke 1, through the pressure of spring 2, to assume its normal position, and in so doing freeing levers 12 and 14, whereupon spring 1S presses the end of lever 14, carrying rod 16 outwardly, and disengages the said rod from disk 20, thereby permitting the rotation of said disk through the motion imparted from pinion 21 through sleeve 23 and arms 24, as hereinbefore described.

Although I have described specifically one particular embodiment of the present invention, yet I do not wish to be understood as limiting mysel:` to the exact form set forth, but shall feel at liberty to deviate from the size, shape, and minor details of structure within the spirit and scope of the present invention.

It will of course be obvious that when the end of the arm is moved to squarely engagev seconds-hand arbor of a watch, comprising a disk having a notched periphery and being rigidly secured to said arbor, a pinion revolubly mounted on said arbor, an annular sleeve interposed between said disk and pin ion and surrounding said arbor, a plurality of arms carried bysaid sleeve and adapted to frictionally Contact said disk while the said sleeve is pressed against said pinion, thereby permitting the transmission of motion from said pinion to said disk by means of friction, and a movable arm operable from outside the watch and extending transversely to the plane of movement of said disk and adapted to be brought laterally into engagement with the notched periphery of said disk for looking the same against movement, substantially as described.

2. In a watch, the combination with friction means for operating the secondsehand arbor, of means for overcoming said friction and stopping said arbor, comprising a lever pivoted intermediate its length, a downwardly-extending arm carried by one end of said lever, means extending outside the watch for operating said lever for bringing said arm into locking engagement with the secondshand-operating means, and a spring pressing the end of said lever carrying said arm for holding the arm normally out of locking e11- gagement with said seconds-hand-operating means, substantially as described.

3. In a watch, the combination with frietion means for operating the seconds-hand arbor thereof, ot means for overcoming said friction and stopping said arbor, comprising a yoke, means for partially rotating the same,

la lever pivoted intermediate its length, an

arm carried by said lever, means for communicating motion from said yoke to said lever, whereby said arm may be brought into locking engagement with the seconds-hand,operat ing means for stopping the movement of the same, means for temporarily retaining said arm in such locking engagement, and means for normally holding said arm out of such engagement, substantially as described.

4. In an arbor-controlling mechanism, the combination with a top plate of a Watch and means for frietionally operating the said arbor, of means for stopping and starting said arbor, comprising a yoke pivoted to said top plate, a spring engaging said yoke for normally holding the same out of operation, a bevel-ended integral lug extending from the periphery of said yoke, an elbow-lever pivoted to said top plate and provided with an arm adapted to engage the beveled end of said lug for operating said yoke, an arm carried by the other member of said elbow-lever extending outside said watch for operating the lever, a second lug extending from the periphery of said yoke, and provided with a beveled end, alever pivoted to said top plate having one end engaging said beveled end ot the lastnmentioned lug, a double-Winged lever pivoted to said top plate and having one end IOO IIO

engaging the free end of said last-mentioned ln testimony whereof I hereunto affix my lever, a downwardly-extending arm carried signature in presence of two Witnesses.

by the free end of said double-winged lever and adapted to operate in a slot in said top JAMES PARKINSON' plate, and a spring pressin g the arm-carrying Vitnesses:

end of said doublewinged lever, substan- T. A. HUNTZBERGER,

tially as described. R. P. BARNETTE. 

